5G network is accelerating the deployment all over the world. 5G is considered to be one of the keys to the upgrading of

personal consumption experience and the transformation of industry digital intelligence. Major economies all over the world clearly

require 5G as an important link in the development of long-term industrial and social infrastructure. Firstly, this paper analyzes the

development status of 5G, the driving force and trend of network evolution; then carries out in-depth research on some key technologies of network evolution; finally summarizes the key points of the article, and looks forward to some identified technical directions that need to be further studied.